12990720 has 144 divisors (see below), whose sum is σ = 44150400. Its totient is φ = 3244032.

The previous prime is 12990701. The next prime is 12990749. The reversal of 12990720 is 2709921.

It is a super-2 number, since 2×12990720² = 337517612236800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65181 + ... + 65379.

It is an arithmetic number, because the mean of its divisors is an integer number (306600).

Almost surely, 2^12990720 is an apocalyptic number.

12990720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12990720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22075200).

12990720 is an abundant number, since it is smaller than the sum of its proper divisors (31159680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12990720 is a wasteful number, since it uses less digits than its factorization.

12990720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 12990720 is about 3604.2641412638. The cubic root of 12990720 is about 235.0775057462.

The spelling of 12990720 in words is "twelve million, nine hundred ninety thousand, seven hundred twenty".